Suction device for dust-removing pneumatic machines.



PATENTBD JULY 23', 190?.

J. R. BLUM.

UNITED STATES @PATENT OFFICE.

JULES REN BLUM, OF PARIS, FRANCE.

SUCTION DEVICE FOR DUST-REMOVING PNEUMATIG MACHINES.

Specification of Letters Patent.

Patented July 23, 1907.

Original application tiled April 19, 1906, Serial No. 312,672. Divided and this application tiled February'ZO, 1907.

Serial No. 358449. Y

To all whom it may concern:

Bc it known that I, JULEs REN BLUM, civil engineer, a citizen of France, residing at 49 Boulevard Pereiro, Paris, France, have invented new and useful Improvements in Suction Devices for Dust-Re.

moving Pneumatic Machines, of which the following is a speciiication.

This invention which is a division of the application Serial No. 312,672 filed April 19, 1900, relates to improved suction devices adapted to be used in coniiection with machines for removing dust from carpets, furniture, certains, tapestry and the like, and the principal object of the invention is to provide for suction devices occupying a small space though bein;r very efficient.

lu the accompanying drawing, Figure l is avertical sectional view of a dust removing pneumatic machine incorporating the improved suction devices, and Fig. 2 is a section taken on lifie A-A of Fig. l and looking towards the left.

The dust removing machine comprises the usual flexible aspiration tube c terminated in a metallic suction mouth o1, a filtering receptacle A the walls of which consist of a frame of metallic Vhoops incloscd in an envelop or shell B adapted to permit the air to pass therethrough andut the same Atime to filter the same, said receptacle being arranged within a hermetically closed box D which is immovably secured upon the stationary flap of the upperbellows l, and the suction devices which will be hereinafter described and claimed. These devices comprise four bellows l, 2, 3, 4 coupled together in pairs with a i'novable flap common toieach pair. To each flap is jointed a depending link or connecting rod a or b jointed at its other end to one of the cranks of a two-crank winch driving shaft c. Rotary motion is imparted to this shaft either mechanically or by hand.

Each bellows has a suction or inlet valve i and an expulsion or outlet valve j. All the suction valves open towarda single vertical compartment c of the casing similarly, and all the expulsion valves into a vertical compartment Z. These two compartments are formed in a flat chamber extending throughout the width of the casing C of the machine, a vertical partition E being provided for'to separate both compartments. This arrangement allows of profiting in the best conditions of all:` the space available.

The suction compartment k is connected with the interior of the filtering rcceptacleA, and the expulsion compartment Z communicates by an orifice q with the interior of the casing C Aof the machine.

The operation of the suction devices can be easily understood: when the movable flaps of the bellows are driven downwards, thel bellows 1 and 3 cause the dust-laden air to be sucked through the filtering envelop B which retains the dust, and at the same time the bellows 2 and 4 expulse the pure air sucked in the previous stroke; when on the contrary the movable suction, while the bellows l and 3 assure the expulsion of the pure air.

A as new and desire to secure by Letters Patent is:

In a machine for removing dust by suction from carpets, furniture, curlains,' tapestry and the like, suction devices comprisingr in combination, an even number of bellows 1, i, 4, coupled together in pairs with a movable flap common to each pair, depending links a, D, connecting the movable flap to the cranks of a winch driving shaft, u suction valve i und an expulsion vai-ve j provided for in each bellows, a vertical Hat compartment I a vinto which lead the suction valves yi and which communicates with the interior ol' the filteringr receptacle A, and a vertical flat compartment l into which lead the expulsion valves j and which l'orins with the compartment lo a. 1121i: chamber extending' throughout the width ofl the casini,r C of the machine, substantially as described and for tle purpose set forth. v

ln testimony whereof l have signed my nnme to this specification in the presence of two subscribing witnesses.

JULES [LIGNE BLUM.

Witnesses l AN'roINr: LAvoIx Hanson C. Coxn.

flaps are lifted up, the bellows 2 and 4 produce the Having now described my invention, what I claim 

